AS3密码强度验证 lwxshow xshow tugg bill

public static function evaluatePwd(sPW:String):int  
{   
if (sPW.length <= 4)   
return 0;   
var Modes:int = 0;   
for (var i:int = 0; i < sPW.length; i++)   
{   
Modes |= CharMode(sPW.charCodeAt(i));   
}   
  
return bitTotal(Modes);   
  
function CharMode(iN:int):int  
{   
if (iN>=48 && iN <=57)   
return 1;   
if (iN>=65 && iN <=90)   
return 2;   
if (iN>=97 && iN <=122)   
return 4;   
else  
return 8;   
}   
  
function bitTotal(num:int):*   
{   
var modes:int = 0;   
for (var i:int = 0; i < 4; i++)   
{   
if (num & 1) modes ++;   
num >>>= 1;   
}   
return modes;   
}   
}  
  
public static function evaluatePwd(sPW:String):int  
        {  
            if (sPW.length <= 4)  
                return 0;  
            var Modes:int = 0;  
            for (var i:int = 0; i < sPW.length; i++)  
            {  
                Modes |= CharMode(sPW.charCodeAt(i));  
            }  
  
            return bitTotal(Modes);  
  
            function CharMode(iN:int):int  
            {  
                if (iN>=48 && iN <=57)  
                    return 1;  
                if (iN>=65 && iN <=90)  
                    return 2;  
                if (iN>=97 && iN <=122)  
                    return 4;  
                else  
                    return 8;  
            }  
  
            function bitTotal(num:int):*  
            {  
                var modes:int = 0;  
                for (var i:int = 0; i < 4; i++)  
                {  
                    if (num & 1) modes ++;  
                    num >>>= 1;  
                }  
                return modes;  
            }  
        }另外还有一个十分简单的算法  
  
public static function evaluatePwd2(sPW:String):int  
{   
return sPW.replace(/^(?:([a-z])|([A-Z])|([0-9])|(.)){5,}|(.)+$/g, “$1$2$3$4$5″).length;   
}  
public static function evaluatePwd2(sPW:String):int  
        {  
            return sPW.replace(/^(?:([a-z])|([A-Z])|([0-9])|(.)){5,}|(.)+$/g, "$1$2$3$4$5").length;  
        }我们可以用多种图形化的界面甚至动画去展现密码的强度，举个简单的例子，例如我希望用户在输入密码后1秒内没有任何输入动作，则验证密码的强度，并且已进度条的形式展示  
  
首先注册一个监听  
  
pwdInputView.password.addEventListener(KeyboardEvent.KEY_UP, onKey);  
pwdInputView.password.addEventListener(KeyboardEvent.KEY_UP, onKey);然后看看监听函数  
  
private var oldText:String;   
private function onKey(e:KeyboardEvent):void  
{   
if (oldText != pwdInputView.password.text && pwdInputView.password.text.length > 5)   
{   
oldText = pwdInputView.password.text;   
TweenLite.killTweensOf(updateStrengthView, false);   
TweenLite.delayedCall(1, updateStrengthView);   
}   
}  
private var oldText:String;  
  
        private function onKey(e:KeyboardEvent):void  
        {  
            if (oldText != pwdInputView.password.text && pwdInputView.password.text.length > 5)  
            {  
                oldText = pwdInputView.password.text;  
                TweenLite.killTweensOf(updateStrengthView, false);  
                TweenLite.delayedCall(1, updateStrengthView);  
            }  
        }首先定义一个oldText成员，用于记录上次输入的密码，如果当前密码和上次密码不相同并且长度大于5，开始执行操作。我这里用了TweenLite作为计时器，1秒后将执行强度判断，如果发现用户在1秒内再次有输入操作，则销毁当前TweenLite。  
  
再看看如何用视图来展示密码强度，这里不多作解释了，只是一个简单的动画效果。  
  
private function updateStrengthView():void  
{   
var toWidth:Number = pwdInputView.strengthCanvas.width * CheckStrong.evaluatePwd(pwdInputView.password.text) * .25;   
TweenLite.to(pwdInputView.maskCanvas, 1.5, {width:toWidth, ease:Bounce.easeOut, overwrite:false});   
}  
private function updateStrengthView():void  
        {  
            var toWidth:Number = pwdInputView.strengthCanvas.width * CheckStrong.evaluatePwd(pwdInputView.password.text) * .25;  
            TweenLite.to(pwdInputView.maskCanvas, 1.5, {width:toWidth, ease:Bounce.easeOut, overwrite:false});  
        }